CAJ | 학술논문

基于李亚普罗夫直接法的能量裕度一直被认为是评价电力系统暂态稳定性的一个重要指标，而能量裕度一直是在线应用关注的重点。该文首先结合经典的电力系统转子运动方程，构建了暂态能量函数模型，然后分析了稳定域基本特征及其与电力系统势能边界的对应关系，并采用二次扰动与基于势能边界特性的插值法相结合的思路获取势能最大值，最后基于势能最大值构建了电网暂态稳定性量化指标。通过在三机系统和IEEE-30母线系统的系列仿真结果及其与CUEP法的对比，验证了该方法能够提高计算速度和计算精度，可用于电力系统暂态稳定性的离线评估。
기우리아보라부직접법적능량유도일직피인위시평개전력계통잠태은정성적일개중요지표，이능량유도일직시재선응용관주적중점。해문수선결합경전적전력계통전자운동방정，구건료잠태능량함수모형，연후분석료은정역기본특정급기여전력계통세능변계적대응관계，병채용이차우동여기우세능변계특성적삽치법상결합적사로획취세능최대치，최후기우세능최대치구건료전망잠태은정성양화지표。통과재삼궤계통화IEEE-30모선계통적계렬방진결과급기여CUEP법적대비，험증료해방법능구제고계산속도화계산정도，가용우전력계통잠태은정성적리선평고。
Energy margin based on Lyapunov direct method has been considered as an important index to quantify the transient stability of power system. Especially its on-line application has been focus of attention. Based on the classical equations of rotor motion, the transient energy function model is first established in this paper. Then the converting relationship between the potential energy boundary surface and the stability region characteristics is described. Based on these, the second kick method and the interpolation method based on the property of potential energy boundary are combined to calculate the maximum of the potential energy. At last, the energy margin model is established based on the maximum of potential energy and the transient energy. The simulation results in three-machine and IEEE-30 bus system and the comparison with CUEP verify the effectiveness and feasibility of the proposed method, which can be used in off-line assessment of transient stability of power system.